J. DeLaski on Glactal Action about Penobscot Bay. 385 
“reali in this process, for by heating a current of air electrized 
y the silent discharge, in such a way that it comes immediately 
in contact with water, ozone and antozone at once disappear, and 
NO, is copiously formed. 
In further experiments, the author demonstrated the presence 
of HO, in water, near whose surface electrical sparks had been 
made to play. 
Thus far we have given quite fully the facts observed by Meiss- 
ner in the first chapter of his book. He finishes the experimen- 
tal part of this chapter with an account of observations which 
lead to the conclusion that the production of ozone and antozone 
is the result of electrical tension, and occupies about 40 pages in 
a discussion of the theories of Clausius, Schénbein, De La Rive, 
and Brodie, and in unfolding his own theoretical views. To 
tender his ideas intelligible would occupy more space than we 
have at command. In fact, this part of the volume scarcely ad- 
mits of abstract. All who are interested in these topics will not 
fail to study the original. 
(To be continued.) 
Arr. XXIX.— Glacial Action about Penobscot Bay; by Mr. JonN 
DE LaskKI. 
Previous to the year 1859, the writer, like most ordinary 
teaders who are familiar with the descriptions of the phenomena 
of boulder action given in our text books, believed that the drift 
material of clay, sand, gravel, boulders, and the scoring of the 
tocky surface of the country, must have been the effects of ice- 
berg action. Up to that time I had not seen any mention what- 
ever of the former existence of glaciers in any part of Maine; 
and I was therefore quite unprepared to doubt that the numerous 
examples of the striated surfaces about the village where I resided 
—Carver’s Harbor, Vinalhaven—were other than those made by 
the chafing of floating ice-mountains over the ledges when these 
formed the bottom of a continental sea. The theory of Hugh 
Miller in his « Popular Geology,” a work then recently published, 
had attracted my attention, which supposes that the eastern de- 
flection of the Gulf stream, at the close of the Tertiary era, carried 
Undergoing the pr f submergence, and that the bergs were 
> mor he cube hills and score and ak them 
wo sgl as the country went slowly beneath the surface. _ 
.. But on attentively examining the scratched rocks of the vicin- 
ity of Penobscot Bay, I could not reconcile the iceberg doctrine 
with the facts connected with these scratches and with the exten- 
